1971 Pacific hurricane season
The 1971 Pacific hurricane season was the first pacific hurricane season with reliable records. It began on May 15, 1971 in the eastern Pacific (east of 140°W), and on June 1, 1971 in the Central Pacific (from 140°W to the International Date Line); both ended on November 30, 1971.
Source: Wikipedia — 1971 Pacific hurricane season (CC BY-SA 4.0)